0x800f0922 Archives

Winsage

June 1, 2026

Microsoft fixes KB5089549 Windows security update install issues

Microsoft resolved an issue causing installation failures and error code 0x800f0922 during the deployment of the May 2026 Windows 11 security update (KB5089549), which was linked to insufficient free space on the EFI System Partition (ESP). The problem mainly affected devices with 10 MB or less available space, leading to automatic rollbacks of the update. The resolution was provided through the release of the Windows 11 KB5089573 preview cumulative update on May 26, 2026. Users installing updates released on or after this date will not need a workaround, while those with earlier updates can use the Known Issue Rollback feature. Additionally, IT administrators in enterprise settings can manually address the issue through Group Policy configurations. The KB5089573 update introduced 30 changes to improve performance and reliability.

Winsage

June 1, 2026

Microsoft confirms Windows 11 update is failing on some PCs, explains if you need a workaround

Microsoft has identified the root cause of installation issues related to the May 2026 update for Windows operating system and is rolling out a solution through an optional update, KB5089573. The May 12, 2026, Patch Tuesday update (KB5089549) introduced enhancements but many users faced installation failures due to error code “0x800f0922,” indicating insufficient space on the EFI System Partition (ESP). The ESP is critical for boot files and typically occupies around 256MB. Users can check ESP storage using a specific command. Low ESP space can lead to update failures, particularly when it drops below 10MB. Microsoft has rolled back problematic code and provided a fix in the optional update KB5089573, which resolves ESP space issues and ensures future updates will proceed smoothly. Users are encouraged to install this update or wait for the next scheduled Patch Tuesday update on June 9, 2026.

Winsage

May 26, 2026

Windows 11’s latest patch is both the problem and the fix

Microsoft's KB5089549 update for Windows 11 addresses taskbar freezing and blank desktop displays but has installation issues due to error code 0x800f0922. The update aims to improve performance related to the taskbar and explorer.exe, with expected enhancements by May 2026. Users report taskbar freezing occurring after login or during desktop interactions. The update also creates a new folder on the user's computer. For those who successfully install it, performance improvements are noted, particularly after logging in. The update targets reliability during log-in, taskbar menu interactions, and Quick Access in File Explorer, aiming to enhance overall performance during the initial boot phase.

Winsage

May 20, 2026

Microsoft confirms Windows 11’s May 2026 update is failing to install with error 0x800f0922 and outlines a mitigation for affected PCs

Microsoft has acknowledged installation issues with the May 2026 Security Update for Windows 11, specifically error code 0x800f0922, affecting devices on versions 24H2 and 25H2 after installing update (KB5089549) released on May 12. The failures occur during the reboot phase, often around 35 percent, primarily on devices with 10MB or less free space in the EFI System Partition (ESP). For consumer and unmanaged business devices, Microsoft has implemented a Known Issue Rollback (KIR), and restarting the computer may resolve the issue. For managed devices, network administrators must manually deploy a Group Policy workaround. Microsoft suggests modifying a Registry value to decrease reserved padding in the EFI partition as a potential fix, along with restarting the computer and checking for updates. A permanent solution is planned for a future Windows update.

Winsage

May 19, 2026

Microsoft confirms patching issues in restricted Windows networks

Microsoft has issued a service alert indicating that customers in restricted network environments may encounter Windows Update failures, specifically error code 0x80010002, after installing the January 2026 optional non-security preview updates. Affected devices might download the February monthly Windows security update but could struggle with updates released in March and beyond due to changes in download timeout requirements. Microsoft is working on a resolution, and IT administrators can use Known Issue Rollback (KIR) as a workaround by configuring the appropriate Group Policy for their Windows version. A device restart is required to apply these settings. Historical issues include a bug fixed in April 2025 affecting WSUS installations and another issue resolved in August 2025 related to the Windows 11 24H2 cumulative update. Additionally, a KIR fix was provided for a known issue causing the May 2026 Windows 11 security update to fail with error code 0x800f0922.

Winsage

May 18, 2026

Windows boot partition runs out of space for Microsoft’s May security update

Microsoft has acknowledged a potential issue with its May 2026 security update, which may fail to install properly due to insufficient space in the EFI System Partition (ESP). If the available space in the ESP drops below 10 MB, users may encounter a 0x800f0922 error code, leading to installation failures during the reboot phase. This issue affects Windows 11 versions 25H2 and 24H2. Microsoft has proposed two solutions: a registry edit or a Known Issue Rollback (KIR), which has already propagated to consumer and non-managed business devices. The update addresses several critical Microsoft CVEs, although there have been no reports of active exploitation.

Winsage

May 18, 2026

Microsoft confirms Windows 11 security update install issues

Microsoft has acknowledged a significant issue with the May 2026 Windows 11 security update, KB5089549, where users are encountering difficulties in installation, specifically the 0x800f0922 error code. This issue is primarily due to insufficient free space on the EFI System Partition (ESP), especially for devices with 10 MB or less available. The installation may fail during the reboot phase at around 35–36% completion, with users receiving notifications like "Something didn't go as planned. Undoing changes." Log entries may indicate insufficient ESP free space, such as "SpaceCheck: Insufficient free space" and "ServicingBootFiles failed. Error = 0x70." Microsoft recommends affected users utilize the Known Issue Rollback feature to reverse problematic updates and advises IT departments to install and configure the relevant Group Policy to address the issue.

Winsage

May 17, 2026

Microsoft confirms Windows 11 KB5089549 issues due to low storage, says it’s rolling out an emergency patch to fix install errors

Microsoft has acknowledged an issue with the installation of Windows 11’s May 2026 Update (KB5089549), which has been encountering errors such as 0x800f0922, 0x80240069, and 0x80240031. An emergency server-side update is being implemented to resolve these installation hurdles. The KB5089549 update is mandatory and intended to install automatically on compatible PCs, but some users have reported difficulties, including installation stalling around 35-36%, leading to a rollback with a message stating, “something didn’t go as planned. Undoing changes.” Investigations reveal that installation failures are particularly affecting devices with limited EFI partition space, with error code 0x800f0922 indicating insufficient free space and potential conflicts with third-party files. The EFI System Partition (ESP) typically occupies no more than 100MB and can become congested due to leftover files, causing installation failures when available space is low. Users with less than 10MB of free EFI storage may face additional complications. A PowerShell command can be used to check EFI storage status. Microsoft has advised users to consider increasing the size of the ESP by modifying the Windows Registry, although the recent server-side update may have already addressed the issue. The Known Issue Rollback (KIR) has been implemented, automatically propagating the resolution to devices. Users are encouraged to restart their devices to expedite the application of the fix, and there are no additional bugs reported.

Winsage

December 21, 2025

Announcing Windows 11 Insider Preview Build 26220.7523 (Dev & Beta Channels)

Windows 11 Insider Preview Build 26220.7523 (KB5072043) has been released to the Dev and Beta Channels. Users in the Dev Channel can switch to the Beta Channel while both channels continue to receive the same updates based on Windows 11, version 25H2. New features include Ask Copilot on the taskbar for commercial users, which allows voice or text engagement with contextual information, and enhancements to the taskbar for monitoring AI agents. The update also introduces Agent Launchers for AI agents across apps, improved customization for Narrator announcements, a refined voice typing experience, and a new Discover Windows widget for tips on Windows features. Language support for the Settings Agent has expanded to include additional languages. Fixes have been made for various issues in the taskbar, File Explorer, login screens, and more. Known issues include unresponsiveness of Researcher on the taskbar and problems with Bluetooth device battery levels. The Paint app has been updated with a collapsible toolbar feature.

Winsage

December 21, 2025

Announcing Windows 11 Insider Preview Build 26220.7523 (Dev & Beta Channels)

Windows 11 Insider Preview Build 26220.7523 (KB5072043) is being released to the Dev & Beta Channels. Insiders in the Dev Channel can switch to the Beta Channel while both channels are offering the same 25H2-based updates. New features include Ask Copilot on the taskbar for commercial customers, which provides one-click access to Microsoft 365 Copilot and a streamlined search experience. The update also introduces Agents on the taskbar for monitoring tasks, Agent Launchers for app integration, and enhanced Narrator customization. Voice typing experience has been improved, and a new Discover Windows widget is being introduced. The Settings Agent now supports additional languages, and the Click to Do feature now supports Microsoft 365 Copilot. Various fixes and known issues have been documented, including improvements to File Explorer and taskbar functionality. The Paint app is also receiving an update with a collapsible toolbar feature.